lib-signals: Redesigned how delayed signals are handled. Fixes signal handler hanging infinitely in write() when many signals were sent rapidly.
lib-signals: Redesigned how delayed signals are handled.
Fixes signal handler hanging infinitely in write() when many signals were
sent rapidly.

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branch : HEAD

jwm/dovecot-notmuch,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jkerihuel/dovecot,jwm/dovecot-notmuch,jkerihuel/dovecot,jwm/dovecot-notmuch,jkerihuel/dovecot,jkerihuel/dovecot,jkerihuel/dovecot